.App-header {
    display: flex;
    justify-content: space-between;
    padding: 30px;
    border-bottom: 1px solid #f5f5f5;
  }
  .left {
    display: flex;
    justify-content: space-evenly;
  }
  .btn {
    margin-left: 20px;
  }
  .rang {
    margin-right: 20px;
  }
  .main {
    padding:0 30px 30px 30px;
  }
  .prolist{
    display: flex;
    .basic{
      margin: 0 25px;
    }
    img{
      padding: 15px;
      border: 1px solid #ccc;
    }
  }
  .prolist_right{
    display: flex;
    justify-content: space-around;
  }
  h4{
    padding:0 5px;
    border-left: 2px solid blue;
  }